Asymmetric Display Pixel Layout for Embedded Biometric Sensing
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Solution Overview
Problem
Existing display devices face challenges in achieving improved sensing performance for biometric information recognition, particularly in terms of accuracy and efficiency.
Innovation Solution
The display device incorporates a pixel layer with a specific arrangement of light emitting elements and light sensing elements, including first, second, and third light emitting elements of varying shapes and sizes, along with a light sensing unit and sensor drive circuit, to enhance biometric information recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sensor arrangements are used, then device simplicity is maintained, but sensing performance for biometric information recognition is insufficient
Solution Approach 1:
The sensor array is segmented into multiple types of sensors (first sensors, second sensors, third sensors) with different configurations. Each sensor type has specific light emitting and light sensing elements arranged in distinct patterns, allowing specialized optimization for different sensing functions while maintaining overall system integration
Solution Approach 2:
Different regions of the sensor array have different local configurations - first sensors have light sensing elements positioned between first and second light emitting elements, while second sensors have light sensing elements positioned between second and third light emitting elements. This local differentiation optimizes sensing performance for specific biometric recognition tasks without requiring complete redesign of the entire array
2Measurement precision
If sensor elements are densely arranged, then sensing accuracy is improved, but manufacturing precision requirements increase
Solution Approach 1:
The sensor configurations use asymmetric positioning strategies where light sensing elements are placed in specific intervals between light emitting elements rather than in uniform grids. This asymmetric arrangement with varying spacing reduces the stringency of manufacturing precision requirements while maintaining effective sensing coverage for biometric recognition
3Adaptability or versatility
If multiple sensor types are integrated, then biometric recognition capability is enhanced, but device complexity increases
Solution Approach 1:
The sensor array is designed with multi-functional capability where different sensor types (first, second, third sensors) can detect various biometric information including fingerprints, palm prints, and other physiological data. This universal design allows a single integrated array to perform multiple recognition functions without requiring separate dedicated sensors for each biometric type
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves the sensing performance of biometric information recognition by optimizing the interaction between light emitting and sensing elements, leading to enhanced accuracy and efficiency in biometric data capture.
Implementation Method 1
Each of the plurality of sensors may include a light sensing element disposed between two second light emitting elements adjacent to each other in a first direction and disposed between the first and third light emitting elements in a second direction intersecting the first direction
Data Source
AI summary
A display device includes a base layer and a pixel layer that is disposed on the base layer and that includes a plurality of reference pixel units and a plurality of sensors. Each of the plurality of reference pixel units includes a first light emitting element, a second light emitting element, and a third light emitting element. Each of the plurality of sensors includes a light sensing element disposed between two second light emitting elements adjacent to each other in a first direction and disposed between the first and third light emitting elements in a second direction intersecting the first direction. The second light emitting element has a different shape from the first and third light emitting elements, and the light sensing element has a different shape from the first and third light emitting elements.